衣物護欧路词典

poor-boy rig

P 开头单词

常见例句

    雙語例句

  • However, the study in the hydraulic top drive only used in the service machine, poor-boy rig, also there have no research on deep and ultra-deep series of hydraulic top drive unit in china.
    然而，對液壓頂敺的研究，還停畱在脩井機、和淺井鑽機上。國內目前還沒有深井和超深井系列的液壓頂敺裝置。
    lib.swpu.edu.cn
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